pip is not available for a particular Python interpreter, or any of the installation requirements is not met.

If pip is not available, install it for the required Python interpreter (see the corresponding troubleshooting tip)

Consult product documentation for a specific package to ensure that it can be installed in your operating system and for the target Python interpreter. Also, check if any additional system requirements should be met.

Docker

Unable to connect to Docker

Docker is not running, or your Docker connection settings are incorrect.

If you are using Docker for Windows, enable the Expose daemon on tcp://localhost:2375 without TLS option in the General section of your Docker settings.

If you are using Docker Toolbox, make sure that Docker Machine is running and its executable is specified correctly in the Settings / Preferences dialog (Ctrl+Alt+S) under Build, Execution, Deployment | Docker | Tools.